AWM: Default content image is not displayed when creating a new entry

Steps to reproduce:

1. Click on "More applications" and then on "Create your own!" in the Applications panel
2. Click "Create Application"
3. Type a name for your application
4. Click "Next Step"
5. Drag and drop the "Content" field
6. Insert an image (upload from your computer)
7. Click "Next Step"
8. Click Finish
9. Add an entry

Expected Result:
The uploaded image should be displayed in the Content field when creating a new entry.

Actual Result:
Instead of displaying the uploaded image, the application shows x.png.